[naga] Update naga with new struct members separator

[Gordon-F]

Description
Update naga version with new struct members separator syntax (gfx-rs/naga#1773)

Testing
All updated examples tested on Windows with DX12 backend.

[Gordon-F]

CI error looks unrelated with PR changes:

--- STDERR:                           wgpu::example/shadow shadow ---
error: XDG_RUNTIME_DIR not set in the environment.
[2022-03-13T11:27:04Z ERROR wgpu_hal::gles::egl] EGL 'eglInitialize' code 0x3001: DRI2: failed to load driver
thread 'shadow' panicked at 'UNEXPECTED TEST PASS: BACKEND', wgpu/examples/shadow/../../tests/common/mod.rs:294:9
stack backtrace:
   0: rust_begin_unwind
             at /rustc/53cb7b09b00cbea8754ffb78e7e3cb[521](https://github.com/gfx-rs/wgpu/runs/5527286574?check_suite_focus=true#step:13:521)cb8af4b/library/std/src/panicking.rs:493:5
   1: std::panicking::begin_panic_fmt
             at /rustc/53cb7b09b00cbea8754ffb78e7e3cb521cb8af4b/library/std/src/panicking.rs:435:5
   2: shadow::framework::test_common::initialize_test
             at ./examples/shadow/../../tests/common/mod.rs:294:9
   3: shadow::framework::test
             at ./examples/shadow/../framework.rs:458:5
   4: shadow::shadow
             at ./examples/shadow/main.rs:855:5
   5: shadow::shadow::{{closure}}
             at ./examples/shadow/main.rs:854:1
   6: core::ops::function::FnOnce::call_once
             at /rustc/53cb7b09b00cbea8754ffb78e7e3cb521cb8af4b/library/core/src/ops/function.rs:227:5
   7: core::ops::function::FnOnce::call_once
             at /rustc/53cb7b09b00cbea8754ffb78e7e3cb521cb8af4b/library/core/src/ops/function.rs:227:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

[kvark]

thank you!